Tumansky M-88

__NOTOC__The Tumansky M-88 was an air-cooled radial engine for aircraft developed in the Soviet Union shortly before World War II. It was designed to address the shortcomings of the M-87. The improvements incorporated in the M-88 were a strengthened crankcase, crankshaft, connecting rods, waffle ribbing at the piston bottom and a two speed geared centrifugal supercharger. The M-88 retained the same bore/stroke and displacement as the M-87 while increasing power to 1,000 - 1,150hp. Design work began in 1937 and by 1939 the first prototypes were being flight tested in the Polikarpov I-180 fighter prototypes. At first the M-88 wasn't a success, but the designers persisted and the M-88 was made into a reliable and widely produced engine. There were a number of different variants with the most numerous being the M-88B, of which 10,585 were produced at Zaporozhye and Omsk. The M-88B solved most of the mechanical failures associated with the M-87 and early M-88's by including oil injectors in the crankshaft, improved cooling and strengthened drive components. 16,087 M-88's were produced.

In hindsight the Tumansky family of engines developed from Gnome-Rhône 9K and Gnome-Rhône 14K, were far less successful than the Shvetsov family of engines developed from the Wright R-1820.

pecifications (Tumansky M-88B)

pistonspecs

type=14 cylinder twin-row air cooled radial engine
bore=146mm (5.75 in)
stroke=165mm (6.50 in)
displacement=38.72 Liters(2,363 cu in)
length=
diameter=

width=
height=
weight=684kg (1,508 lb)
valvetrain=
supercharger=2 speed geared centrifugal
turbocharger=
fuelsystem=
fueltype=
oilsystem=
coolingsystem=air
power=1,100hp
specpower=
compression=6.1:1
fuelcon=
specfuelcon=
oilcon=
power/weight=

Applications

* Sukhoi Su-2
* Ilyushin Il-4

References

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